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Atoms and Elements - 5th Grade

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William Begoyan

on 11 May 2016

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Transcript of Atoms and Elements - 5th Grade

Atoms and Elements 5Th Grade
The Atomic Theory
was an ancient Greek who lived in 400 B.C.
He was the first person who
that matter is made of tiny particles called "
John Dalton was an English scientist who lived in the 1800's.
He was the first person who
that matter is made of tiny particles called "
Structure of an Atom
Now we know that not only is matter made of atoms, but atoms are made of smaller parts themselves.
These parts are called sub-atomic particles and there are 3 types.
are positive particles located in the nucleus.
are neutral particles located in the nucleus.
Electrons are negative particles located outside the nucleus in orbitals.
Much smaller than protons or neutrons (2000 times smaller).

Most of an atom's mass is in the nucleus.
is a substance made of only one kind of an atom.
For Example:
Pure gold is only made of gold atoms.
A gold atom is the smallest unit of gold that has all the properties of gold.
Most elements do not exist in nature alone, and are found linked together, forming
Most matter is made of
(Pages C40-C45 in your textbook)
75% of all of the known elements are metals.
All metals, except mercury, are solid at room temperature.
All metals share the following 4 characteristics.
- being able to be stretched out.

- being able to be hammered in to shapes.
- all metals are shiny.
- all metals are good conductors of heat and electricity.
QUestions #1
1. Who was Democritus?
2. Who was John Dalton?
3. How is a proton different from a nuetron?
4. How is a proton different from a electron?
QUestions #2
1. What is an element?
2. What is a compound?
3. Why are metals such a big deal?
4. What are some properties that all metals share?
Page 13 in ISN
Full transcript